I have set the TPT upright. I do not know if light was leaking in (I do not think so) but there are definitely leaves forming at the end of the sprouts. As long as they do not begin to rot, I will let them grow.
This is the largest sprout that is visible and you can see the leaves. They have 10”-11” to go to break the surface. I will continue to take photos of there progress and keep you posted. As usual, all comments are welcome. John